In a medium skillet, heat oil over medium-high. Stir in bell pepper and onion - cook until translucent, about 3 to 4 minutes. Add sausage - cook, stirring to crumble, until the sausage has browned, about 4 to 6 minutes. Remove from the heat and set aside to cool.

Pour mixture into an 8" x 8" baking dish coated with cooking spray - scatter the top with the remaining 2 ounces (about 1/2 cup) cheese. Place into the oven and bake until the center is set and the top is golden, about 20 to 25 minutes. Remove and let cool for at least 5 to 10 minutes before cutting. Sprinkle with remaining two tablespoons chopped parsley to serve.